138900048 has 80 divisors (see below), whose sum is σ = 414247296. Its totient is φ = 39283200.

The previous prime is 138900043. The next prime is 138900071. The reversal of 138900048 is 840009831.

It is a junction number, because it is equal to n+sod(n) for n = 138899991 and 138900018.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138900043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31890 + ... + 35982.

Almost surely, 2^138900048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138900048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207123648).

138900048 is an abundant number, since it is smaller than the sum of its proper divisors (275347248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138900048 is a wasteful number, since it uses less digits than its factorization.

138900048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4212 (or 4206 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 138900048 is about 11785.5864512548. The cubic root of 138900048 is about 517.8859535353.

Adding to 138900048 its reverse (840009831), we get a palindrome (978909879).

The spelling of 138900048 in words is "one hundred thirty-eight million, nine hundred thousand, forty-eight".